Dithienylethenes functionalized by triphenylethene and difluoroboron β-diketonate fragments: Synthesis, optical switching behavior and fluorescent turn-on sensing for volatile organic amines

Tetraphenylethene-Modified Colorimetric and Fluorescent Chemosensor for Hg2+ With Aggregation-Induced Emission Enhancement, Solvatochromic, and Mechanochromic Fluorescence Features

“…Studies of fluorescent dyes with solvatochromism are considered to be important, and solvatochromic luminogens can be used to evaluate solvent parameters. On the other hand, fluorescent organic molecules that are responsive to mechanical stimulus have attracted substantial interest because of their promising applications in mechanosensors and fluorescent switches (Chen et al, 2015;Chen et al, 2017;Chen et al, 2018;Chen et al, 2019;Wang et al, 2020;Zhang et al, 2020;Hu et al, 2021;Hu et al, 2021;. In this work, we reported a TPE-modified rhodanine derivative (Chart 1), and the compound exhibited AIEE and mechanofluorochromic characteristics.…”

“…Notably, fluorescent sensing has become a powerful tool for the detection of Hg 2+ (Kiani et al, 2020;Singh et al, 2020;Xu et al, 2020;Tian et al, 2020;Nan et al, 2021). Highly emissive materials in the aggregation state have drawn much attention because of their broad applications in chemical sensing, bioimaging, and photoelectric devices (Tong et al, 2014;Huang et al, 2014;Song et al, 2016;Tang et al, 2019;Zheng et al, 2019;Li et al, 2021;Cheng et al, 2021;Wang et al, 2021). However, traditional luminogenic molecules commonly suffer from a troublesome luminescence "aggregation-caused quenching (ACQ)" phenomenon (Mei et al, 2015).…”

Recent advances in aggregation-induced emission (AIE)-based chemosensors for the detection of organic small molecules

“…PMMA films loaded with C42a and C42b can detect n -propylamine vapour with LODs of 1.67 and 1.65 ppm, respectively, via yellow-to-blue and red-to-yellow fluorescence change, respectively. 270 In another example, NIR-emitting fluorophore C43 bearing pyrrolopyrrole aza-BODIPY core was found to show selective detection of diamines and biogenic amines via a dark green-to-yellow colour change, and the turn-on of bright orange fluorescence, due to B–N bond cleavage followed by fast hydrolysis to form smaller conjugated molecules. 271…”

Recent advances in the synthesis of luminescent tetra-coordinated boron compounds

“…47 Dithienylethene containing boron-β-diketonates were synthesized and studied for their multiresponsive character including photoresponse under photoexcitation by different groups. [48][49][50][51][52][53] Compound 30 was utilized by Yam's group and compound 31 was studied by the Li group (Fig. 4).…”

“…[77][78][79][80][81][82][83][84][85] Li and co-workers further explored the photoisomerization reaction using theoretical studies. 86,87 In 2019, the Wang group 88 reported the synthesis of five pairs of regioisomers (53)(54)(55)(56)(57) based on the indolizino [3,4,5-ab] isoindole backbone as shown in Fig. 8.…”